Open the Lock (LeetCode 752)

Phone ScreenZipLast reported November 2025Low Frequency

Reported: 3× across candidate reports
First seen: November 2025
Last reported: November 2025
Reported outcome: mixed

Problem Overview

Open the Lock (LeetCode 752) A combination-lock rotation problem. You are given a lock with four circular wheels, each showing a digit 0-9, wrapping between 9 and 0. One move rotates a single wheel one position. Starting from "0000", reach a target combination in the fewest moves while never landing…

1 candidate-reported follow-up — the exact probes interviewers asked, with the trigger for each
The rest of the problem statement — full requirements, constraints, and edge cases
Approach and trade-offs — what passing candidates did, and the mistakes that sink people

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Verified Source

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Interviewer Follow-ups

The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.